Irish Scot
/ˈʌɪrɪʃ ˌskɒt/noun
1 Celtic Hist. = Scot, especially a Dalriadan settler in what is now western Scotland.
2An inhabitant of Ireland who is of Scottish origin or descent; (later) specifically = Ulster Scot.
3An inhabitant of Scotland who is of Irish origin or descent.
Origin
Late Middle English; earliest use found in John Trevisa (c1342–?1402), translator. From Irish + Scot.